131 lines
4.1 KiB
C++
131 lines
4.1 KiB
C++
/*
|
|
* Copyright (C) 2011 Google Inc. All rights reserved.
|
|
* Copyright (C) 2018 Apple Inc. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are
|
|
* met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following disclaimer
|
|
* in the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* * Neither the name of Google Inc. nor the names of its
|
|
* contributors may be used to endorse or promote products derived from
|
|
* this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "ExceptionOr.h"
|
|
#include "GCReachableRef.h"
|
|
#include <wtf/Forward.h>
|
|
#include <wtf/HashSet.h>
|
|
#include <wtf/IsoMalloc.h>
|
|
#include <wtf/Vector.h>
|
|
#include <wtf/WeakHashSet.h>
|
|
|
|
namespace JSC {
|
|
class AbstractSlotVisitor;
|
|
}
|
|
|
|
namespace WebCore {
|
|
|
|
class Document;
|
|
class HTMLSlotElement;
|
|
class MutationCallback;
|
|
class MutationObserverRegistration;
|
|
class MutationRecord;
|
|
class Node;
|
|
class WindowEventLoop;
|
|
|
|
using MutationObserverOptions = unsigned char;
|
|
using MutationRecordDeliveryOptions = unsigned char;
|
|
|
|
class MutationObserver final : public RefCounted<MutationObserver> {
|
|
WTF_MAKE_ISO_ALLOCATED(MutationObserver);
|
|
public:
|
|
enum MutationType {
|
|
ChildList = 1 << 0,
|
|
Attributes = 1 << 1,
|
|
CharacterData = 1 << 2,
|
|
|
|
AllMutationTypes = ChildList | Attributes | CharacterData
|
|
};
|
|
|
|
enum ObservationFlags {
|
|
Subtree = 1 << 3,
|
|
AttributeFilter = 1 << 4
|
|
};
|
|
|
|
enum DeliveryFlags {
|
|
AttributeOldValue = 1 << 5,
|
|
CharacterDataOldValue = 1 << 6,
|
|
};
|
|
|
|
static Ref<MutationObserver> create(Ref<MutationCallback>&&);
|
|
|
|
~MutationObserver();
|
|
|
|
struct Init {
|
|
bool childList;
|
|
std::optional<bool> attributes;
|
|
std::optional<bool> characterData;
|
|
bool subtree;
|
|
std::optional<bool> attributeOldValue;
|
|
std::optional<bool> characterDataOldValue;
|
|
std::optional<Vector<String>> attributeFilter;
|
|
};
|
|
|
|
ExceptionOr<void> observe(Node&, const Init&);
|
|
|
|
struct TakenRecords {
|
|
Vector<Ref<MutationRecord>> records;
|
|
HashSet<GCReachableRef<Node>> pendingTargets;
|
|
};
|
|
TakenRecords takeRecords();
|
|
void disconnect();
|
|
|
|
void observationStarted(MutationObserverRegistration&);
|
|
void observationEnded(MutationObserverRegistration&);
|
|
void enqueueMutationRecord(Ref<MutationRecord>&&);
|
|
void setHasTransientRegistration(Document&);
|
|
bool canDeliver();
|
|
|
|
bool isReachableFromOpaqueRoots(JSC::AbstractSlotVisitor&) const;
|
|
|
|
MutationCallback& callback() const { return m_callback.get(); }
|
|
|
|
static void enqueueSlotChangeEvent(HTMLSlotElement&);
|
|
|
|
static void notifyMutationObservers(WindowEventLoop&);
|
|
|
|
private:
|
|
explicit MutationObserver(Ref<MutationCallback>&&);
|
|
void deliver();
|
|
|
|
static bool validateOptions(MutationObserverOptions);
|
|
|
|
Ref<MutationCallback> m_callback;
|
|
Vector<Ref<MutationRecord>> m_records;
|
|
HashSet<GCReachableRef<Node>> m_pendingTargets;
|
|
WeakHashSet<MutationObserverRegistration> m_registrations;
|
|
unsigned m_priority;
|
|
};
|
|
|
|
} // namespace WebCore
|